[Haskell-beginners] How to install new GHC ?

[Baa]

@Francesco: seems that code which I tried to test with new compiler is
out-of-date for it's Template Haskell "API".

@David: I planned to check existing code with new compiler (to be sure
that my code is OK), but seems that it needs to re-wrire the code, so
I will comment problematic test, GHC bug happens only is the test and
not in usual application code.

@all: Thanks a lot for all tips and help!!

PS. IMHO seems that Template Haskell gives more problems then solves
them :)

===
Best regards, Paul

> If your original goal was to test for a ghc panic in newer ghc, my
> final suggestion would be to get a minimal example that panics
> without all these extra dependencies.  If you happen to find that the
> bug exists in newer ghc,  you'd have to do that anyways to submit a
> useful bug report.
> 
> On Tue, Dec 12, 2017 at 9:06 AM, Baa <aquagnu at gmail.com> wrote:
> 
> > I done it, but got the same error. My project uses several my
> > packages (libraries), they are called 'my-*'. I changed in
> > their .cabal-files versions range of "base" too, but error is the
> > same. Build-depends stanza of executable looks like:
> >
> >   build-depends:       base >= 4.9 && < 4.11
> >                      , text
> >                      , my-common-utils
> >                      , my-atlassian-utils
> >                      , my-jenkins-utils
> >                      , my-git-utils
> >                      , aeson
> >                      , network-uri
> >                      , network-info
> >                      , text-show
> >                      , hslogger
> >                      , bytestring
> >                      , transformers
> >                      , aeson-pretty
> >                      , time
> >                      , email-validate
> >                      , streaming
> >                      , containers
> >                      , sqlite-simple
> >                      , directory
> >                      , tuple
> >                      , async
> >                      , mime-mail
> >                      , HaskellNet
> >                      , HaskellNet-SSL
> >                      , mustache
> >                      , path
> >                      , exceptions
> >                      , mono-traversable
> >                      , data-default-class
> >                      , path-io
> >                      , split
> >                      , microlens
> >                      , microlens-th
> >                      , regex-pcre
> >                      , pcre-utils
> >                      , unordered-containers
> >                      , formatting
> >
> >  
> > > On Tue, Dec 12, 2017 at 03:38:30PM +0200, Baa wrote:  
> > > > 1. GHC 8.2.2 is here:
> > > >    ~/.stack/programs/x86_64-linux/ghc-tinfo6-8.2.2/bin
> > > > 2. done
> > > > 3. yes, it's 8.2.2
> > > > 4. `cabal new-build` said to me call `cabal update`, I done it,
> > > > then run it again and got:
> > > >     $ cabal new-build
> > > >     Resolving dependencies...
> > > >     cabal: Could not resolve dependencies:
> > > >     trying: XXX-0.5.0.0 (user goal)
> > > >     next goal: YYY-utils (dependency of XXX-0.5.0.0)
> > > >     Dependency tree exhaustively searched.  
> > >
> > > Good, we're almost there!
> > >
> > > I strongly suspect it is a base constraint. Go in your
> > > something.cabal file, build-depends section(s) and modify it from:
> > >
> > >     base >= 4.somenumber && < 4.10
> > >
> > > to
> > >
> > >     base >= 4.somenumber && < 4.11
> > >
> > > And try cabal new-build again. If that fails, please include the
> > > content of your `build-depends:` portion in your message
> > > -F
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> >
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